Full Working of electric generator(class 10 physics)
Answers
Principle: Electric generator works on the principle of electromagnetic induction. It converts mechanical energy into electrical energy.
Construction: A loop ABCD is rotated in a permanent magnetic field. Its ends are connected with two semi-circular rings as shown in the figure below. These rings are insulated from each other and can slide while remaining in contact with brushes X and Y. A galvanometer is connected between the two ends of the brush.
Working: On rotating the loop in a magnetic field, the side AB moves upward and the side CD moves downwards. Thus magnetic flux linked with the loop changes and a current is induced in it whose direction can be determined by Flemings right hand rule.In the figure, the current is flowing through the path
B-A-G-D-C.
After half rotation, the ring P comes in contact with brush Y and the ring Q, comes in contact with brush X. Thus, the brush X is always in contact with the side moving upwards and brush Y is always in contact with side moving downwards as a result of which the current flows in one direction. This current is called direct current. This type of generator is called D.C. generator. Similarly, instead of a half ring, if a full ring is used then, A.C. current can be generated and such a generator is called an A.C. generator.
Answer:
An electric generator is a device that converts mechanical energy obtained from an external source into electrical energy as the output. ... Instead, it uses the mechanical energy supplied to it to force the movement of electric charges present in the wire of its windings through an external electric circuit.
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